(Euphorbiaceae). Milkweed, Spurge. Genus of about 2,000 species of shrubs, succulents and herbaceous perennials. Some semi-evergreen or evergreen turning vivid red shades in spring. Widely distributed in temperate, subtropical and tropical regions. Flower heads consist of umbels of cup-shaped bracts usually containing several flowers often yellow and long lasting. Once established, it can withstand periods of drought. Stately plant preferring moist humus-rich soil in dappled shade.